durability properties of coal washery rejects concrete with bottom ash as partial replacement of coarse aggregate

  D. Mohammed Rafi,  Dr. B. Jayaramireddy,  V. Madhava

As the demand of natural coarse and fine aggregates is becoming high day by day in construction industry, attempts are being made to search for alternatives to aggregates. In India, about 70% of electricity is produced by combustion of good quality coal. During coal washing process, large quantities of impure coal so called coal washery rejects (CWR) and coal bottom ash (CBA) are getting accumulated and posing disposal problems. As the construction industry is the feasible application to reuse waste materials, this investigation is mainly intended to introduce CWR as an alternative to coarse aggregate and CBA as an alternative to fine aggregate and study the mechanical properties of CBA based concrete. In this study, coarse aggregate is partially replaced by CWR at various levels (0% - 75%). The optimum replacement level of CWR was found at 40%. CBA based concrete is made with 40% replacement of CWR in coarse aggregate and fine aggregate is partially replaced by CBA at various levels (0%, 25%, 50% and 75%). The rapid chloride permeability, water absorption and drying shrinkage properties were determined at different curing periods and compared to M 25 grade of conventional concrete (CC).

Keywords- shrinkage,permeability,absorption,washery,disposal)

Unique Identification Number - IJEDR2101024
Page Number(s) - 186-189
Pubished in - Volume 9 | Issue 1 | January 2021
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  D. Mohammed Rafi,  Dr. B. Jayaramireddy,  V. Madhava,   "durability properties of coal washery rejects concrete with bottom ash as partial replacement of coarse aggregate", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.9, Issue 1, pp.186-189, January 2021, Available at :http://www.ijedr.org/papers/IJEDR2101024.pdf